Back pack frame for dental equipment



FIG. 1 is a left side elevational view of a back pack frame for dental equipment showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof.

The partial showing of surface shading indicating a fabric texture on the center band in FIGS. 1 and 3 is understood to be continuous over the entire surface of the band. 

The ornamental design for a back pack frame for dental equipment, substantially as shown and described. 